[setup.py] only write "Release {new_version}" as commit message
[setup.py] only write "Release {new_version}" as commit message

The tag message will contain the full release notes.

Also, read bumpversion options from **kwargs.

jamesgk/ufo2fdk,googlefonts/ufo2ft,googlei18n/ufo2ft,moyogo/ufo2ft,jamesgk/ufo2ft